Note 4 - Accounts Receivable - Components of Accounts Receivable (Details) - USD ($) $ in Thousands |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Statement Line Items [Line Items] | ||
| Receivable from Minera Juanicipio (see Note 6 & 14) | $ 1,944 | $ 658 |
| Value added tax ("IVA" and "GST") | 152 | 122 |
| Other receivables | 1 | 117 |
| Current trade receivables | $ 2,097 | $ 897 |